用烧结法制备了化学计量比和高Ba含量的两组BaO-Al2O3-SiO2(BAS)系微晶玻璃,研究了晶种对低温烧结BaO-Al2O3-SiO2系微晶玻璃析晶的影响.结果表明,玻璃的软化温度随着品种含量的增加而提高.在两组玻璃粉中添加晶种有助于降低析晶活化能,促进六方钡长石和单斜钡长石的析出;晶种含量为1%时活化能最小,成分为化学计量比的玻璃析晶峰值温度也最低.在850℃保温时间2 h,添加1%晶种的BAS系微品玻璃全部转变为单斜钡长石.在两组成分的BAS系微晶玻璃中,六方钡长石的析出表现为整体析晶.不加晶种时,单斜钡长石通过六方钡长石一单斜钡长石的晶型转变析出,表现为整体析晶;添加晶种后,单斜钡长石主要因"同构"效应直接从基础玻璃中析出,表现为表面析晶.
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